Quote:

---

Regarding a .22 RF extra long? I haven't heard of it.

There was .22 RF shorts.
The standard now .22 RF Long Rifle.
An inbetween .22 RF Long.

---

Left to right:
.22 short hv by Remington
.22lr by Eley
.22 CCI Stinger
.22 extra long by RWS, 20 mm copper case, probably pre-WW1
.22 WMR